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प्रश्न
A car travelled 60 km to the north of Patna and then 90 km to the south from there. How far from Patna was the car finally?
उत्तर
Let the distance covered in the direction of north be positive and that in the direction of south be negative.
Distance travelled to the north of Patna = 60 km
Distance travelled to the south of Patna = -90 km
Total distance travelled by the car = 60 + (-90)
= -30 km
The car was 30 km south of Patna.
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